Best Rear Window Defroster Relays

Looking for the best rear window defroster relays? We’ve tested and reviewed the top 10 options to help you find the perfect fit for your vehicle, offering durability, performance, and easy installation.

Rear window defroster relays are essential for keeping your view clear in cold weather. They ensure your defroster works reliably and efficiently. Choosing the right one can make all the difference in your driving experience.

We’ve tested and reviewed the best rear window defroster relays to help you find the perfect fit. Whether you drive a Honda, BMW, or Toyota, we’ve got you covered. Discover the top picks that promise durability, performance, and easy installation.

List of Top 10 Rear Window Defroster Relays

Title	Best For	Price
4 pcs Relay G8HN-H70 Rear Window Defroster Heater Fan Relay for Automotive 39792-SDA-A01,39794-S0K-A01,39794-S04-014,39794-S04-004	This 4-piece relay set is perfect for car owners who need a reliable replacement for their rear window defroster heater fan relay. It’s easy to install and works great for Honda and Acura vehicles.	View on Amazon (paid link)
PartCatalog Rear Window Defroster Relay Compatible with BMW 335i 3.0L L6 2009 2008 2007 P-2685948	This PartCatalog Rear Window Defroster Relay is perfect for BMW 335i owners who need a reliable replacement for their 2007-2009 model. It’s easy to install and fits perfectly, ensuring your rear window defroster works like new.	View on Amazon (paid link)
Rear Window Defroster Relay Compatible With Acura MDX 2007 2008 2009 2010 2011 2012 2013 2014 2015 PC-858743	This Rear Window Defroster Relay is perfect for Acura MDX owners from 2007 to 2015 who need a reliable replacement part. It’s easy to install and fits perfectly, ensuring your rear window defroster works like new.	View on Amazon (paid link)
GM Genuine Parts 84749906 Rear Window Defogger Relay	This GM Genuine Parts Rear Window Defogger Relay is perfect for car owners who want reliable, high-quality parts for their Chevrolet, Buick, GMC, or Cadillac. It’s designed by GM engineers to fit your vehicle perfectly and work like new.	View on Amazon (paid link)
DENSO Rear Window Defroster Relay Compatible with Toyota Sienna 2004-2007	This DENSO Rear Window Defroster Relay is perfect for Toyota Sienna owners with models from 2004 to 2007. It’s a direct replacement that fits perfectly and comes with genuine parts and original packaging.	View on Amazon (paid link)
Rear Window Defroster Relay Compatible With Honda CR-V 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 PC-858782	This Rear Window Defroster Relay is perfect for Honda CR-V owners who need a reliable replacement part. It’s easy to install and fits perfectly, ensuring your rear defroster works like new.	View on Amazon (paid link)
Wells WVE Rear Window Defroster Relay compatible with Chevrolet Cobalt Corvette Equinox Express 1500 Express 2500 Express 3500 M 1997-2012	This Wells WVE Rear Window Defroster Relay is perfect for Chevrolet owners who need a reliable replacement part. It’s easy to install and works with Cobalt, Corvette, Equinox, and Express models from 1997 to 2012.	View on Amazon (paid link)
PartCatalog Rear Window Defroster Relay Compatible with BMW 328i 3.0L L6 2009 2008 2007 P-2685938	This PartCatalog Rear Window Defroster Relay is perfect for BMW 328i owners who need a reliable replacement for their 2007-2009 model. It’s easy to install and fits perfectly, ensuring your rear window defroster works like new.	View on Amazon (paid link)
GMBooskr Rear Window Defroster Relay 25230-7996A for Infiniti Fx35 Fx45 G20 G35 I30 I35 J30 M30 M35 M45 M45 M56 Q45 Qx4 Qx56 for Nissan 200sx 240sx 300zx 350z 720 PickupAltima Armada Axxess	This Rear Window Defroster Relay is perfect for car owners who need a reliable and durable replacement part. It’s ideal for Infiniti and Nissan models, ensuring your vehicle’s blower motor system works efficiently.	View on Amazon (paid link)
URO 001 542 97 19 Rear Window Defroster Relay	This URO 001 542 97 19 Rear Window Defroster Relay is perfect for car owners who need a reliable replacement part. It’s easy to install and works great for keeping your rear window clear.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Rear Window Defroster Relays in our expert-curated guide. Each product is thoroughly reviewed for performance, reliability, and value. Whether you prioritize comfort or affordability, this guide helps you find the perfect fit for your vehicle. Read on to make an informed choice and keep your rear window clear in all weather.

1. 4 pcs Relay G8HN-H70 Rear Window Defroster Heater Fan Relay for Automotive 39792-SDA-A01,39794-S0K-A01,39794-S04-014,39794-S04-004

The Relay G8HN-H70 is a 4-piece set designed for Honda and Acura vehicles. It fits universal models like 39792-SDA-A01 and 39794-S0K-A01. This relay is a direct replacement for various automotive functions.

It operates on 12 volts and has 4 pins, making it multi-purpose. The relay features normally open contacts and is SPST. Its high power capability handles demanding applications with ease.

Installation is simple and quick, ensuring high reliability. It replaces multiple relays, including those for A/C compressors, radiator fans, and rear window defrosters. This product enhances performance and is built to last.

Pros	Cons
Direct replacement for multiple Honda Acura relay models. Easy installation, no hassle, saves time and effort. High reliability for demanding automotive applications. Multi-purpose relay, replaces various vehicle functions.	Limited to specific Honda Acura models, not universal. No instructions included for easy installation. Single relay type, may not fit all applications.

Perfect For:

This 4-piece relay set is perfect for car owners who need a reliable replacement for their rear window defroster heater fan relay. It’s easy to install and works great for Honda and Acura vehicles.

Ready to Purchase?

View Price on Amazon (paid link)

2. PartCatalog Rear Window Defroster Relay Compatible with BMW 335i 3.0L L6 2009 2008 2007 P-2685948

The PartCatalog Rear Window Defroster Relay is compatible with BMW 335i models from 2007 to 2009. It includes one relay for your vehicle. This part is designed for a perfect fit.

It offers exceptional quality and performance, meeting or exceeding original equipment standards. Installation is simple and fuss-free, ensuring a seamless replacement. You’ll experience reliable performance just like the original part.

Check the fitment chart in the image gallery to confirm compatibility with your vehicle. This relay ensures optimal performance every time.

Pros	Cons
Direct fit, no hassle installation for your BMW. OE quality, meets or exceeds original performance standards. Perfect compatibility, ensures optimal performance every time. Seamless replacement, designed for specific vehicle models.	Limited to specific BMW models, not a universal fit. No installation tools included, requires extra purchase. Single-part purchase, may need additional components later.

Perfect For:

This PartCatalog Rear Window Defroster Relay is perfect for BMW 335i owners who need a reliable replacement for their 2007-2009 model. It’s easy to install and fits perfectly, ensuring your rear window defroster works like new.

Ready to Purchase?

View Price on Amazon (paid link)

3. Rear Window Defroster Relay Compatible With Acura MDX 2007 2008 2009 2010 2011 2012 2013 2014 2015 PC-858743

Keep your Acura MDX’s rear window clear with this rear window defroster relay. It’s a direct replacement for the original part.

This relay is designed to fit your Acura MDX, years 2007-2015. It’s easy to install, with no complications. Just swap it in and you’re good to go.

Experience exceptional quality and performance with this OE replacement relay. It’s built to meet or exceed the standards of your original part, ensuring optimal performance every time.

Pros	Cons
Perfect fit for Acura MDX models from 2007 to 2015. Direct replacement, easy to install with no complications. High-quality performance, meets or exceeds original standards. Seamless compatibility, ensures optimal function every time.	Limited to specific Acura MDX models, not universal. No installation tools or instructions included, DIY required. Single-part purchase, no bundle options for multiple replacements.

Perfect For:

This Rear Window Defroster Relay is perfect for Acura MDX owners from 2007 to 2015 who need a reliable replacement part. It’s easy to install and fits perfectly, ensuring your rear window defroster works like new.

Ready to Purchase?

View Price on Amazon (paid link)

4. GM Genuine Parts 84749906 Rear Window Defogger Relay

The GM Genuine Parts 84749906 Rear Window Defogger Relay is a reliable and high-quality component. It is designed and engineered by GM to meet strict standards.

This part may have been previously known as ACDelco GM Original Equipment (OE). GM regularly updates its designs to include new materials and technologies.

It is specifically made for Chevrolet, Buick, GMC, or Cadillac vehicles. GM backs this part, so you can trust its performance and durability.

Pros	Cons
Designed for your GM vehicle. Rigorous testing ensures quality. OE parts for perfect fit. Latest tech for performance.	Limited to specific GM vehicles, not universal. Higher price compared to aftermarket alternatives. No DIY-friendly installation, professional help may be needed.

Perfect For:

This GM Genuine Parts Rear Window Defogger Relay is perfect for car owners who want reliable, high-quality parts for their Chevrolet, Buick, GMC, or Cadillac. It’s designed by GM engineers to fit your vehicle perfectly and work like new.

Ready to Purchase?

View Price on Amazon (paid link)

5. DENSO Rear Window Defroster Relay Compatible with Toyota Sienna 2004-2007

Keep your Toyota Sienna’s rear window clear with this DENSO Window Defroster Relay. It’s a direct replacement for your 2004-2007 models. You’ll get genuine DENSO quality in the original packaging.

This relay ensures your defroster works perfectly. It’s designed for a perfect fit and easy installation. Confirm your vehicle’s fitment with Amazon’s helpful tool.

Drive with confidence in all weather. Your clear view is important.

Pros	Cons
Perfect fit for Toyota Sienna 2004-2007 models. Genuine DENSO quality ensures reliable performance. Easy installation with included original hardware. Direct replacement saves time and hassle.	Limited compatibility with older Toyota models. No installation instructions included. Higher price than some alternatives.

Perfect For:

This DENSO Rear Window Defroster Relay is perfect for Toyota Sienna owners with models from 2004 to 2007. It’s a direct replacement that fits perfectly and comes with genuine parts and original packaging.

Ready to Purchase?

View Price on Amazon (paid link)

6. Rear Window Defroster Relay Compatible With Honda CR-V 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 PC-858782

Replace your faulty rear window defroster relay with this high-quality, direct-fit part. It’s designed to meet or exceed the performance and quality of your original equipment. This OE replacement is a perfect match for your Honda CR-V (2007-2018).

Installation is simple and hassle-free, ensuring a seamless replacement process. Check the fitment chart to confirm compatibility with your vehicle.

Pros	Cons
Direct fit for Honda CR-V models from 2007 to 2018. Easy installation, no complications or fuss required. OE quality ensures top performance and reliability. Perfect compatibility for a seamless replacement process.	No warranty or guarantee details provided. Limited compatibility with other vehicle models. Single relay included, no extras or accessories.

Perfect For:

This Rear Window Defroster Relay is perfect for Honda CR-V owners who need a reliable replacement part. It’s easy to install and fits perfectly, ensuring your rear defroster works like new.

Ready to Purchase?

View Price on Amazon (paid link)

7. Wells WVE Rear Window Defroster Relay compatible with Chevrolet Cobalt Corvette Equinox Express 1500 Express 2500 Express 3500 M 1997-2012

Wells WVE Rear Window Defroster Relay is a direct replacement for your Chevrolet. It works with many models from 1997 to 2012.

This part is genuine Wells WVE. It comes in original packaging with all hardware included. You get a perfect fit for your vehicle.

Check your car’s fit with Amazon Confirmed Fit. Installation is simple and straightforward. Keep your rear window clear with this reliable relay.

Pros	Cons
Perfect fit for Chevrolet models from 1997 to 2012. Genuine Wells WVE parts ensure top quality. Direct replacement with original packaging and hardware included. Easy vehicle fitment check with Amazon Confirmed Fit.	Limited to specific Chevrolet models, not universal. No warranty or return policy mentioned. Relies on Amazon for vehicle fitment confirmation.

Perfect For:

This Wells WVE Rear Window Defroster Relay is perfect for Chevrolet owners who need a reliable replacement part. It’s easy to install and works with Cobalt, Corvette, Equinox, and Express models from 1997 to 2012.

Ready to Purchase?

View Price on Amazon (paid link)

8. PartCatalog Rear Window Defroster Relay Compatible with BMW 328i 3.0L L6 2009 2008 2007 P-2685938

Get your BMW 328i back in top shape with this Rear Window Defroster Relay. It’s a direct replacement for your original part. Enjoy exceptional quality and performance.
This relay offers a perfect fit for your vehicle. Installation is simple and straightforward.
Ensure perfect compatibility by checking our fitment chart. Get your car’s defroster working like new again.

Pros	Cons
Restore your defroster quickly. Direct fit, easy installation. OE quality for top performance. Guaranteed compatibility for your BMW 328i.	May require specific tools for installation. Verify fitment before purchasing. Not a universal part; check compatibility.

Perfect For:

This PartCatalog Rear Window Defroster Relay is perfect for BMW 328i owners who need a reliable replacement for their 2007-2009 model. It’s easy to install and fits perfectly, ensuring your rear window defroster works like new.

Ready to Purchase?

View Price on Amazon (paid link)

9. GMBooskr Rear Window Defroster Relay 25230-7996A for Infiniti Fx35 Fx45 G20 G35 I30 I35 J30 M30 M35 M45 M45 M56 Q45 Qx4 Qx56 for Nissan 200sx 240sx 300zx 350z 720 PickupAltima Armada Axxess

GMBooskr Rear Window Defroster Relay 25230-7996A for Infiniti Fx35 Fx45 G20 G35 I30 I35 J30 M30 M35 M45 M45 M56 Q45 Qx4 Qx56 for Nissan 200sx 240sx 300zx 350z 720 PickupAltima Armada Axxess

The GMBooskr Rear Window Defroster Relay is a reliable part for your car. It works with many Infiniti and Nissan models. Check the OE code before buying.

This relay ensures your blower motor system runs smoothly. It’s built with high-quality materials for long-lasting use.

Enjoy a 1-year warranty for peace of mind. Contact us through AMZ for support. Worry-free after-sales service included.

Pros	Cons
Fits many cars, from Infiniti to Nissan, no problem. Built tough, lasts long, handles daily use with ease. Works great, keeps your rear window clear and safe. 1-year warranty, buy with confidence, worry-free.	May need OE code check. Compatibility might vary.

Perfect For:

This Rear Window Defroster Relay is perfect for car owners who need a reliable and durable replacement part. It’s ideal for Infiniti and Nissan models, ensuring your vehicle’s blower motor system works efficiently.

Ready to Purchase?

View Price on Amazon (paid link)

10. URO 001 542 97 19 Rear Window Defroster Relay

The URO 001 542 97 19 Rear Window Defroster Relay is a single-unit product. It comes with no core charge required. This part weighs just 0.12 pounds.

This relay is easy to install and reliable. It ensures your rear window defroster works smoothly.

Pros	Cons
Lightweight design for easy installation. No core charge required, saves money. Single quantity for simple replacement needs. Reliable performance for clear rear windows.	Limited to single use, no bulk options. Lightweight design may feel less durable. No core charge, but no return policy.

Perfect For:

This URO 001 542 97 19 Rear Window Defroster Relay is perfect for car owners who need a reliable replacement part. It’s easy to install and works great for keeping your rear window clear.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Clear rear windows are key to safe driving in cold weather. A reliable rear window defroster relay ensures your defroster works when you need it. Choosing the right one can make all the difference.

Buying a rear window defroster relay is easy when you know what to look for. We’ve tested and reviewed the best options to help you find the perfect fit. Here’s what to consider:

Compatibility:
Make sure the relay fits your car’s make and model. Check the fitment chart or OE code to avoid mistakes.
Quality:
Look for high-quality materials and durable construction. Genuine parts or OE replacements often offer the best performance.
Ease of Installation:
Choose a relay that’s easy to install. Direct replacements with simple instructions save time and effort.
Performance:
Ensure the relay meets or exceeds original equipment standards. It should work reliably in all conditions.
Warranty:
A warranty gives you peace of mind. Look for products with worry-free after-sales service.
Price:
Compare prices to find the best value. Affordable options can still offer great quality and performance.

With these factors in mind, you’ll find the perfect rear window defroster relay for your car. Drive safely and enjoy a clear view all winter long!